Recovering Bios - IBM TotalStorage 201 User Reference Manual

Table 6. Power error messages (continued)
Message
System under recommended voltage on
3.3 v (level-warning; 3.3 volt supply under
nominal value)
System under recommended X current
(level-non-critical; system drawing less
current than recommended on voltage "X")
"X" V bus fault (level-critical; overcurrent
condition on "X" voltage bus)
12V "X" bus fault (level-critical; overcurrent
condition on 12 volt "X" voltage bus)
5V fault (level-critical; overcurrent condition
on 5 V subsystem)
240 VA fault (level-critical; overcurrent or
overvoltage condition in power subsystem)

Recovering BIOS

If your BIOS has become corrupted, such as from a power failure during a flash
update, you can recover your BIOS using the recovery boot block and a BIOS flash
diskette.
Note: Note: You can obtain a BIOS flash diskette from one of the following
The flash memory contains a protected area that cannot be overwritten. The
recovery boot block is a section of code in this protected area that enables the NAS
200 to start up and to read a flash diskette. The flash utility recovers the system
BIOS from the BIOS recovery files on the diskette.
To recover the BIOS:
58
NAS 200 User's Reference
Action
1. Check connections to power subsystem
2. Replace power supply
3. Replace power backplane
1. See "Power problems" on page 57
1. Check for short circuit on "X" voltage bus
2. See "Power problems" on page 57
1. Check for short circuit on 12 volt "X" voltage bus
2. See "Power problems" on page 57
1. Check for short circuit on 5 v bus
2. See "Power problems" on page 57
1. See "Power problems" on page 57
sources:
v Download a BIOS flash diskette from the Web site at
v Contact your IBM service representative.
1. Power off the NAS 200 and peripheral devices. Disconnect all external cables
and power cords. Remove the cover.
2. Locate the boot-block jumper block (J16) on the system board. See Figure 2
on page 59.
3. Place a jumper on pins 2 and 3 to enable the BIOS backup page.
4. Insert the BIOS flash diskette into the diskette drive.
5. Restart the NAS 200.
6. When the NAS 200 completes POST, select 1 -- Update POST/BIOS from the
menu that contains various flash (update) options.
7. When you are asked if you would like to move the current POST/BIOS image
to the backup ROM location, type N. Attention: Typing Y will copy the
corrupted BIOS into the secondary page.
8. When you are asked if you would like to save the current code on a diskette,
select N.